amateur

Jerry is an amateur who dances because he feels like it.

杰瑞是一位业余舞蹈爱好者，他跳舞因为他喜欢跳。

In 1969, the Radio Amateur Satellite Corporation (AMSAT) was created in order to foster ham radio enthusiasts' participation in space research and communication.

1969年，无线电业余爱好者卫星社团（AMSAT）成立以促进自满的业余无线电爱好者参与太空研究和交流。

Brian considered Sam a lightweight, a real amateur.

布赖恩认为萨姆是个无足轻重的人，是个真正的业余选手。

There's an old saying in the space world: amateurs talk about technology, professionals talk about insurance.

在航天界有一句老话：外行谈技术，内行谈保险。

Amateur skaters from all over the tristate area compete.

来自各地三州区的业余滑冰者前来参加比赛。

But observations that an amateur bird-watcher can make are really limitless.

但是一个业余观鸟者所能做的观察是无限的。

The challenge here, of course, is ensuring that what an amateur community considers to be responsible.

当然，这里的挑战是，要确保业余社区考虑的东西是负责任的。

This agent was so clumsy and amateur that he was detected by others.

这个特工笨手笨脚的，业务也不熟练，以至于被其他人发现了。